Master operating mechanism for cell doors and locks



' Dec. 16, 1930.

2 Sheets-Sheet Filed Aug. 15, 1929 ATTORNEYS Dec. 16, 1930. D. F. YOUNGBLOOD MASTER OPERATING MECHANISM FOR CELL DOORS AND LOCKS Filed Aug. l5, 1929 2 Sheetsf-Sheet 2 llllmllllll "in KI'IIIHIIIIV ATTORNEYS i Patented Dec.`r16,ji193(i)V` f Y Fracaflpevin snijnxtnafounetcon; on, san-Auronzo, TEXAS MASTEIBERATNG lunolemsia ronfcnnn noonsnnn LOCKS Y l Appnanpnlea August 1.57,1929? serial nopssaesa vThis invention relates 'to door and lockl` of4 operating mechanism for akpl-urality prison cells and, among .other objects, aims to provide Vimportant improvements Qnl `sys-l 5 tems of the` general type shown Ain inyxPatf' ents, 1,269,244vand1 1,611,260;`4 .One yoff-the main features is the provision of means doorsV Willv not be leftpartly open when the locking bar is movedto locking position. Also, itv insuresy that all selected doors' shall.

befully Vunlocked before any .offtliean .can 20 be opened. .fg z .Y `Other more or less important aims 'and ad vantages of the invention -Will appear inthe specification taken :in` ,connection with" the accompanying .drawing-s, wherein?, 2 Fig. 1 isa fragmentary sectionalsvievv showing .the 4preferred p form lof mas-ter op;

I `erating mechanism-;

tional. View showing a `top planof the opel*- ating mechanism;

` Fig; 3 is a fragmentary taken on the line of'jFi-gg 1f; and

Fig.Y 4 is a sectional view .takcn'on the. line Y 4 4 0f Fig. s.

arate lever-s or hand Wheels `connected ltotlie master lockingV barand. the-'master propelling bar. Also, theoperating devices-foi' the]y bars areindependent .ofeach'otllen VEX- amples of such :operating and lcontrolling 15' n'icchanisln .are disclosed in .aforesaid pat,` ents. The presenti invention, providesse.f lectvely l,operable means Whcrebyya single lcvcrclhand Wheel may be employed to ace. tuate either @fthe bals'and associated means tc lock the. `other bar and. held it immovable Fig; 2 is a fragmentary horizontalfsec# sectional View .In the master locking anddooroperatng. systems for jails orv prisons nwherein a serle-sf of ycell doors areaeontrolled Vand' selectively operated from :a `central station, :the Vmecha nism -heretofore employed has included'sep-V until tliefselected bar has been fully lactuated. I

Further, the selected embodiment of the im#V proved-mechanism is .so constructed and arranged asftzenable'a jai'ler to, complete V`the Y .operations very quickly land expeditiously While an unauthorized person or a prisoner .proper coDubin-ation., In the draWingS ;,;tl1c Preferred formof the vmeclianismisshoW-n as being adapted tocontrol andj operate jthe locks anddoors ofja serlesqofVV cells Which are usually-arranged in a lrow. Thearrangement of the cell doors and locks, 'the yoperating connections between them and the master bars, andthe Aselecting kmechanisiaifor vthe locks constitute no part g of the -s'ubject'f matter of this .f application.

cannot ope'nanydoors vvthoutlniowing the Hence,any Vill ustia'tion of such'mechanism is unnecessary. Itissufficient here i state that .a master ylockoperating bar '10 and :a

parallel-master door pro ell-ing barll are airanged an @verlag-xaH casing or longi-A tud1n-alvho=us1gng12 andy arev adaptedl to be connectedtofsejlected flocks-V yand doors of a serieszcrrowlOfcells., i

In the present instance, Va single master op- Y erating handle in the form of afhandrvvheel 13m-arranged ina master insetcontrol box like `that disclosed .in-my copending application, jSenlNo'. 3,532, filed June 25, 1929 and is adapted to beselectively connected to actuate either of said barsbymeans of transmission gearingzand gear shifting mecha.

nism'unde-,l athelcontrol ofthe jailer. Y

- Referring to Figs. 1, 2 and 43,l the hand Wheel 13 isthere shown as being mounted on a shaft 15 which is journaled in vbearings 16 and 17 Within the control box behind a vertical lpanel 18. 'Herein, a bevel gear 19 on the shaft.V 15 meshes WithV a similargear 2O on a f 'verticali shaft 211.j`ournaled at its upper and lovver ends insuitable brackets 22 in the form o-fgear casings. Another bevel gear 23 in I theupp'er casing v22 meshes -With a gear 24 on a horizontal shaft 25 arranged .to operate the transmission-mechanism about to be de scribed. -vy v I Referring `to Figs. Sand 4, the shaft 25 has a bevel-gear -26xmeshing Witha v.combined p bevelandspur l'gear 27v rotatably mounted on a iixed shaft 2 8 in a frame 29 within the housing 12 as best shown in Fig. V3. Apair of spur gears or pinions and 31 conveniently cast are shown as being slidably andjrotat-` vably mounted on' a-transverse shaft 32 and are adapted to engage racks 33 and 34, re-

spectively,o1 i`the bars 10 and '1L/Herein the bars 'have' rearward rachel-extensions `through the fra1ne'29 and the racks. are .so Y spaced that theys'traddlethetwo gears30 and 31 when the gears are inneutralposition as:

shown in Fig. 4, the upper` edges ofthe bars being guided by rollers'35. 'lt will'now be seen that the gears orpinions are arranged to be shifted-so'thatone of themengages the rackon one ofthe bars. z f.

@To shift the gears so that they will engage the" respective racks, there Aisi-shown ai shift- "iiio' oke' 36V )ivota'll mounted on a vertical ,e 3H l Y pivot pinl. andengaging an annular groove 38 on'tlie gear' casting; rllhis yoke iisrconnectedto be shifted by `Ineans of Vahan'dlever 39 extending throughV` an opening inthe panel 18 4 f engage the panel andholdthe leverlinv either shifted positionor in the neutiialposition, the middle notch holdingV the lever mits neutral position. A s-V shown in Fig. I1, the lever is pivotally connected to a fvertical-pivoted rocker arm 41 which, in turn,is pivoted to" a link. 42valso pivotally conneetedltolan operating arm or bell crank'arm 43 `on the yoke 36 (rig. e).

gears and 31. may be quickly shifted` into mesh' with the respectiveracks 33 and byV lifting and pushingorpulling the I-rnanipulating lever. 3 9' and Athen fturningthe hand wheel 13. `The spur gear 30 always vremains in mesh with the gear 27, the teethbeingzgfsuf-v 4e ficiently wide for this purpose. vInlig. '3,

both bars 'havebeen actuated tounlock and open theseleeted doors.

\ It is desirable :to lock'bothofth'e master bars 10i and 11 when'tlie gears are in their neutral positionand alwaysto lockonebar whiletheother bark is being actuated vand thereby positivelyprevent any unauthorized manipulation ofthe doors or'the lo'cks. As-

sume, for example,that several selected doorsV have been unlocked by actuating the ba'r 10,

- it .is important that the 'prisoners' in theseerfshall be assured that all selected locks are lected cells shall not push thev doors open'v until the jailer is ready to release them, or possibly until attendants are stationed at-the respective doors to: receive the. prisoners. Moreover, it highly desirable that the jailfully released or `unlocked when he shifts the gearsfto open the doorsjand-.that allfdoors shall be fully closed when'heshiftstheygears to lock them. To these ends, a shiftablel Y locking bolt 44 is shown as being arranged to coi-operate with and' engage both master bars and isA preferably, though. not necessarily,

lf yoke 3 6.

vided Vat the. centerof the bolt.

The arrangement is `such that the ble for thispurpose.

connected to be actuatediby the gear shifting in the illustrative. example, the vlocking bolt' 44`isin the form of ahorizontal bar whichY isslightly longer than thel space between thev rack extensions 33 and 34, and it is slidably mounted in alinedopenings in two spaced, vertical. brackets 45.0nthe transmis- Y sionframe casing29 (Figs. 2 and 3,). yAs shown, the yoke36 has aforwardly extending arm 46 beyond the pivot-'pin 37 and this arm hasa forked or bifurcated end engaging opposite fiat portions 47 conveniently pro- The idea is to shift the bolt in one direction when the gears are shifted in the 'oppositedirection Herein, the *master locking bar 10 has a recess `48 .to receive the bolt-when this bar is j pulledback to-f'itslocking position andba hole 49 is drilledy through thel rack toy receive. the

bolt when the bar is pushe'dito its-unlocking position. i Also,'the 'propelling-.barpresents.

aj through-opening 50 to i receivel )the :bolt

when this bar isili-its.door-closin` position :in which. the parts are'usually Vleft :by the jailer.r` Itl will; now beunderstood that the first operation thatlis necessaryis'to select lil() the locks to be actuated orunlocked. 'As previouslystated, the particular. selector mechanism does not constitute a part of this application. It may be Veither electrical 'or vniechanical' or a combination of electrically and mechanically controlled devices. Infthe present instance, it is sutcient to statethat the locks may conveniently be selected bymeans of small individual, notched hand levers..52 projectingthrough the panel v18 and easily accessible'to the operator-or jailer. One such lever is vusually yprovided-'forv each door lock and is suitably connected toft-he'selecting --mechanis'm at the door by means of links and leverswhich it is not necessary to describe.

However, reference is again made to the -nifechanismy shown and describedin `my Patent Nos. 1,269,244 and 1,611,260 as being suitvAfter the locks' have beenfselected by actuatingthesmall levers 52 or suitable electric switches, as thecase Inayfbe,it is necessary to push the master locking bar 10 forwardly or tothe-left as shownin Figs2 and 3. 'For this purpose, the gear shifting lever 39 is lifted-and pulled' outluntil the rear notch 40 engages the panel, thus vshifting the gear i3()` into mesh vwith the rack 38;- Aiter .the gearl is shi-ftech'the' yoke will slide the b olt'44 out of the recess 48 andl its oppositeend will pro-y ject through the openingftl.` This leaves the locking bar Afreeto move. Thenr'the ja'i'ler.-

turns the hand Wheel until it Vstopslnnd the locking barhas moved tothe left as far as 1t can go. Thismovement or operation brings the hole 49 intovalinement ivith-thelboltf44- lWhile this operation is in pr `)gress,`` the bolt extending through the hole' 50 locksv the pro.

elline bar and revente an unauthorized P e connected thereto.

' Y movement thereof or oi the doors'operatively VThe jailernext shifts thegear 3l intomes'h.

with the rack 84on ythe propelling and simultaneously shiftsvthe bolt 44 -out of the hole 50 into and throughgthe hole 49`in the rack of the locking bar. .He then turns the f hand Wheel in the proper direction andpushes the propellingbai as far olnvardly` or tothe left as it will go, so'that the doors operatively connected thereto' are fully opened. "This" `brings the' recess"51,intoalinement' vvith the bolt 44. Vhile the propelling barlvvas being' moved or operated, it Willbe .seenkthat the Vlocking bar was held locked by the boltv 44.

. A tionaslioivn inFigB-bytlie simple expedient' j of raising the lever89 and pushing'it inward- 18 asishown in Figfl.

To .close and againlock theldoors,the gea-rv 31 is engaged with the rack on the propelling" bar, thereby disengaginggthe bolt from the recess 5l and the hand Wheelis again rotated to pull the hardback as far as vitivilll go or until"1tlie -hole `50, is` brought into f alignment with thefb olt. \The'geardBO 1s next shiftedV to engage the.rackf 'on the locking bar thereby shifting the `bolt '44' intoand throughthe hole 50. The handV Wheel is again rotated to move the ,harto its locking position, 'and thenthe bolt 44is again shifted to engageboth barsanduthe gears are shifted to "neutral position. It

iniglit'be added here'V that the jailer cannot-V shiit thev gear' 31er the' bolt 44 untilthe Vhole does aline with thebolt This insures that all of the doors are `"fully closedbefore the lockinghar can be operated. Likeivise5 the gear 3l cannot be shifted into mesh With the rack on the propellingfbar untilfthe locking bar has been moved-to Vthe unlocking position and the hole-49 is alined with the'.`

bonn.' Y

Advert-ing to the recesses 48 and 51 inthe racks?) and 34, thereason'that they are not drilled through the racks is thatth'ereis never any occasion to shitthe `bolt` through shitedout-of the lrecesslto release the pro# lv until the middle notchengages 'the panel' a cape.o fprisoners. l'

any-such holes. 1^ As A'abovefdescribed,` the bolt iis iirst .shiftedoutof "the :recess 48 to `releasejtlfre` locking bar. -Whenl the bolt is in polling bar. The bottomsfofthese recesses therefore prevent th'ebolt from{being shifted in `the Wrong direction even ifzthe jailer shouldtemporarily forget his combination. Aterthe cycle of operations has been completed, the jailer shifts thelever39 to its Vneutral'posi-tionand sallofthe lselecting the bo'lltx44 in engagementjwith.fthe recess 48 .andhole 5 0 -inivthjebars-IO andwlflff This pre-f Q vents any unauthorized movement of the maslevers-52totheirinactiveposition: and'leaves f i ter barseven it someof the prisoners should 'Y gain 'access to them from their cells.l The door of the control box` is then closed and locked vas described in my aforesaid cependinglapplication. 'Itis thusfnot onlyl practically impossible fior' any unauthorized pereu son to gainfaccessto the master operatingVv mechanism fwithinf, the control bon, but also exceedingly difficult-tor anyone to manipulate the `mechanism Without knowing the s proper combimition.Vv The described cycle oi' operationsj'as isj already apparent, requires shiftinglevers andthe :hand Wheel. rllhe- Whole Ithing g is f in' the nature lof a combina'- `familiarity with' the mode of Working-the 9`5` l tionwhi'ch isquit'eas diilicult tovvvorkjas that in a combinationlock. y

. Fromv allot theioregoing description, ity will be seen that lthe single lhand Wheel performs all of thevoperations heretofore per# that i the relatively simple and inexpensive transmission mechanism makes it possible to s 1055 .ofthe masterloclnng bar'and propelling bar' so coordinatefthe ,movements and Yoperations as to Aavoid almostfany"possibility.of a serious mistake. -jlvloreoverxthe V'method of operati'ngthemechanism is so utterlydifferent Vfrom the ordinary mechanism Vthat it is'exceedin5- lydi'l-licult Ifor 'an inexperienced personv or visitor to Jmanip'ulateit and Vassist in the ves- It is desired lagainto `emphasize jsome of Y y. i

the main advantages'ot the particular trans'- mission and bar-locking mechanism herein shown and described. VAshes already been stated, both.theymaeterpropelling bar andv lock operating' har are lock-ed Whenthe transmission gears are in neutral position. The pinion i'or operating the master propelling Abar cannotbe shifted nntil .all ofthe cell doorshave beenlfully unlocked. The master propelling bar isheld locked While thelock. operating-bar. is bei'ngnctuated. The lock operatingbaris locked While-thenaster pro-V pelling bar isibeing operated. Also,` the nw rangement prevents the shi'tingof the gears out of engagement with the master propelling bar untll vthe selected .cell ooorsare entirely "formed by a pair of levers or hand Wheels and i closed,xtliiis insuringfthat-noneof the doors `-Willibe left :partly open., -Further, the gear,v

foroperating the `loc-king baricannot bashift- Y ed out of engagement With the rackon the locking bar untilfallzo the selected doors are either entirely locked.' or unlocked: :The importance of many. oflthese'features can only beappreciated by a jailer of hing experif ence, Who knows the Y habits of ingenious criminals and the dangers incident to maintaining proper ordeifamongithemand keepingk them securely*fiiicarcerated. I-Ience, further elabo'atiofl hlcl-S vbelieved t0; Abe, unnecessary. t y

Obviouslyythe present invention is, restricted tothe particular embodiment thereof herein shown and described.V Moreover,

f it is not indispensable that all. the features of alVhat'is `claimed, is.; l

mechanism.

' theinvention beused c'onjointly,A since they maybe employed advantageously in various combinations and sub-combinations.-

l. In a master operating;systemifoi cell doors and locks having .locking mechanism and door propelling mechanism, a single actuating element; and means tol connect' said element so that it Will actuate either the locking mechanism or the door propelling mechanism. i

Infa masteroperatingfsystem for cellV doors and locks having locking mechanism and door propellingfinechanism,.a single actuating element; and means Y selectively' to connect said element .to actuateeither the locking mechanism i or the `:door propelling In a master-operating systeinfor'l cell doors" and lockshavingamasterlock operating member and amasterrdoor `propelling member, a'single actuating element for both members; rand means connecting saidele ment to 'a'ctiiate said members;

4. In a master operating system for cell doors and ylocksT having locking mechanism and'fdoor lnope'lling mechanism; "single actuating element.; andtraiismission- Vgearing arranged selectively to' connect .said element to-actuate the lockingc mechanism or the .door propelling mechanism. r g

v5. In a master operating systemior cell doors and locks having a master lockroperating member and -a master-door propelling member, a single actuating element for both members, and Vtransmission mechanism selectively to connectsaid element to actuate said members. i

v6. In a master operating system for cell doors and locks having a master lock operating bai' and a master'door propelling bar, a single manual actuating means; and means selectively to Vconnect said .actuating device to actuate said 'bars'.rv y' g 7. In a master operating system for .cell doors and locks having a master lock operating bar and ak master door vpropelling bar,

to f actuate said bars including transmission mechanismtoc'onnect said actuating means 4 to vactuatefeither of saidbarsf,`

a 8. In*a-masterioperating.system'for cell doors and locks having locking mechanism' and door propelling mechanism; a single actuating element y Vmeans to-v connect the ing mechanism orxto the door'propelling mechanism; and associated means loclr'tlie inactive mechanism; While 'the other mechanisinis .being actuated. f i V9. Ina masterl operating system for cell doorsrandiloeks .having a master lock oper-I Vating bari and a-inaster door propelling'bar7 a `single vactuating element for both menibei's; .means to VcOnIIeCtthe actuating elcnient to-ac'tuate eitherof said bars; and means associated With the connecting means to loclr 'oneoi the barsand :hold it loclred f ating bar anda masterdoor operating bar,r

a; single manualjactuatiiig means; transmission .gearing arranged vto 'connect the-actuating Vmeans toactuateleither of said'bars;

and an'associatedf locking bolt'to engage the in a'ctii'fe bar .ivhilethe other bar isl being actuated.-

l2. Ina master operating system for cell doors andlocks havingfa master. lock `operating bar and a 'master door propelling bar,

a single .manuall means. connected selectively toiactuate `said bars. including vtranemission mechanisinto engage said means fso fas' to actuateeither of said bars.

13.5In'a master operating'sy'stem lfor cell doors iand locks having a master lock operatingv bar and a master door Vpropelling bar, manual means connectedselectively. to actuate said bars including transmission lmechanism to effect engagementof said means with either of said bars; andl means to manipulate the. transmission mechanism to eiect such selective engagement;

14. In a master operating system for cell doorsand locks having a master lock operating bar and a master door propelling bar,

manual meansconnectedselectively to actuactuating element to @actuate either the loclilUO llo

ate said bars Vincluding transmission gears shi-ta'ble to engage said bars Aand gear shifting meanstoeffect the selective engagement.

' 15`.`In a masterfoperating system'for cell doors and locks/having a master lock oper- 19.1111,agmaster'-'operatingsystemf,forcell*Y inf y V member fwhen thegearinofis connected to actuatethe other memberga:

ating bar and a masterLdoorip'ropelling bar,` manual means connecte'dselectivelyjto actuate said bars includingtransmission gears shiftable to engage said bars; and a man-Vv nal gear kshifting lever for said transmis-1 ating 1nember`and `a master ldoorpropelling' member; a single aotnating-elenientfor both members; transmission gearing to connect said element to actiiate said members; agear shifting vlever to4 effectV selective engagement locking mea-ns alsolconnectedto be'aC-tiiated by said leverk to lockf and holdftlieinactive 17. {I-n a masteroperatingui'systemfor: `cell Y doors an'dlocks hajvinga .master "lockoperating member anda master f door propelling member, a s ingleactuating element forbotliv members; transmission gearing 'A connecting f said element to actuate said members;fa-gear `shifting `lever to eiiect select-ive engagement 10i said gearing with saidmember's 4shiitable .l locking means connectedfto 'saidJ'lever. `and `arranged to" be shifted into engagement -vvithg` the inactive member When said gearing `isV connected tothe Vother member.

' 18.*In a master operating system forcelle doors and lockshaving amaster lock'operati of said gearing With saidrmemberswya shift-1 V Vable lockingfboltarranged to yengage either .510,V Y A g Y .y

' armscoiinectin'g'saidlever to saidcigearing ing Vmember 'andv a lf-master door`Ypr'opellingV member, a single actuating element for both, i

members; transmission: 'gearing' connecting or both of said members @and -pivotedfsliifting and said jlockingfbolt to shift tliein so that Y .thel'ockingbolt `engages the infactivemember when tlie gea-r Vshift ris made :toni actnate the other-member;- f'

doors and 'locks Qhaving a .masterlocliloperat i ing member andfa masterdoorA propelling the vlever to thefgearing.; eai'iclfa sliiftingz-Yarin for-tliejlocking bo'lt integral vvith-"said-yolrearranged to shift the 5 lockingy b olt '7 into ,i en-v gagement' with A one of themembers When thev '-1 (iQ-gear shift ismade.toaactii'atetlie:otherfmemv structedand arranged as toeng'agebothmem- 1i ver-@mtr Y Y jleverconnecteditojsaidishiftingyoke; anda Y. sing-le vhand Wheelconnectedfto act'iiatesaid bar and 21.".111 a masterl'operatingsystemlfofr cell -doors i and flocks; a master locking bar and master door-propelling bar each having/ay mission i gears selectively sliiftablef into enf sagement bariv Y doors and locks,l a, master locking bar "and la gmaster'doorpropellingbar eacli having a vraclrat one end;xa` rotatable shaft adjacent to the racks? on Vsaidpbars gears "slidablyxand rotatablymo'unted on said shaft and adapted to be shiftedin-to engagementivith the racks a single v, actuating meai'isfgto rotatetheishaft :andV geanshifting 'means having la' shifting elementfadlacent to said'factuatinglmeans. f

Withfsaid: racks to actuateA either l rackat oneJend; vand a'single mensualy actiilf `ating: meansfforrsaidvbars includingtransj n Y s 22,.,-na master'operatingsysteni orcell i i .of said gearinglWitli1-said'-members; and* Y n 23."Ina-"master operating system Jorgcell i' I doors Vand locks,- amaster locking bar 4and a master Ajfdoor' propelling lb'ar each having*l *aV rack 1 at S one i end ;V a transmission :device` incliiding shiftable gears arrangedto engage and ac tate either of the racks; a hand Wheel connected torrotate-Jsaidl gears; and gear .Vshifting means including-a shifting leveradjacent'to thehand Wheel'Whereby'thefhand l' 'Y ""jwheel isconnectedto actuate leither bar.

Inga master operating system for cell doors .and locks; Va master locking bar; and a "masterfdoor, propellingV ba'rxeach" having a said element to saidimembers ;A a gear shifting lever Vconnectedto effect-*selective engagement rackY 'at'.one'fend; yatran'smission device inrinoY cludin'g shiftable'gears larranged Ltoiengage i the;'rev'.vith;.-.aiid a bolt shiftingjarm integralr v l withT said `yoke n' and on the oppositeiside of "thepiyotgsofthatlasga gearf is shiftedinto en.-

'gagem'enti-'Withtherack of one ba r,t'he` bolt Will" be. shifted `in" the g opposite'xdirectionfto l releasethatbar and engage and lockthef lother member'ga singleactuatingelenientfor .both J f I' members; transmissio'nyV gearing Y connecting Y said velement to saidrn'embeifs; a gear shifting j Vle've'rfto "reflectA selective `engagement" off saidV Y gearing vWith said members; s hiftable lock#` fing l bolt.. l' arranged to"engage,` either go'r fliboth of said Y1nembers1;` al" shifting yoke connecting;

g 25.( In ainas'ter operating system `iorcell tending across and1V below -Ythebars ;"a transverse/[shaft in fsaid casin-gj'adj-acent to :said

facksjifal s o.. Y

ivot'injsaid casing; zarremete" hand doors andv loclgspwherein aA master "1 jeemksfsgpsir of piniqns sudatiy*mental,on 1 saidshaft and `engageablef vvitliftlie respective l l gear fshiftin'gyoke monntedl on; a i251v locking kmeans rranged `to engage `eine -or both of sald vbars when they areelther- 1n door closmg and doo;` loekl'ngposltlons or 1n door openlng' and door "unlockmg pos;-

tions and adapted 't0L be. released from only one bar at any time so that the released ban to Vshift vsaid maybe actuated; and means bar lockmg means.

In testimony, that I as my own, I have heretoaxed my signa'- DAVIDY FRANKLIN YoUNGLoon;`

,LmA

Aclaim the toregong CERTIFICATE OF CORRECTION.

Patent No. 1,785,470. Granted December 16, 1930, to

DAVID FRANKLIN YOUNGBLOOD.

It is hereby certified that error appears in the' printed specification of the above numbered patent requiring correction as follows: Page 4, line 60, claim 6, for the word "means" read device; same page, line 66, claim 7, strike out the words "to actuate said bars including" and insert instead manual actuating means; and; same page, line 74, claim 8, strike out the word "to" and insert the same before "lock" in line 75; page 6, line 18, claim 26, before the word "to" insert the words so as; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 13th day of January, A. D. 1931.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

